not exactly sure what you mean by "non-theoretical", but i like the krejcik myself
Any fun non-theoretical gambits?


Stafford Gambit...
by Black...
https://www.youtube.com/results?search_query=stafford+gambit+eric+rosen

Zilbermints Gambit against the Scandinavian (White)
Zilbermints Gambit against the Center Game (Black)

The Morphy Gambit: Fight the Stafford gambit with the Stafford gambit up a tempo. Every move except f6 loses.

Stafford Gambit...
by Black...
https://www.youtube.com/results?search_query=stafford+gambit+eric+rosen
The Stafford Gambit is refuted:

ACCEPTED Carokann Mieses Gambit (same ideas from the 5...Bg4 move order)
The Krejcik vs the Alekhine is easy to play as Black Qe4 g6 Nf3 Bg7 d4 Qf6 Bg5 Qf5 with Rf8 and Kg8 if necessary...and White will be outplayed!

Tricks and Traps will get you to bottom tier club player that is about it
It's not a trap, it's a way to cheese the need for study. All it gives you is a confused opponent which can't castle and a position that you are more familiar with.
It is a Trick and a form of bad hope chess...that the player of the Black pieces (me) who employed the Alekine Defence (again me) doesn't know or is less familiar with resulting position and knows not how to hand castle because they (again me) have never encountered a player like you.
All you all can keep thinking marginal opening choices resulting in wins against 1300 rated players equates to great chess on your part, but " you are only fooling yourself if you believe it" Play the Triple Lindy Double Dip Reverse Reversed for the win!
The " Triple Lindy" is the dive Rodney Dangerfield did in "Back to School" I just poke sarcasm at all the goofball openings that are employed or people want named such and such variation. And put spins on it like play The Double Double Quad Triple Reverse Reversed, etc

I mean like… no, not really. If you play a gambit, you NEED to outbook your opponent in every line. For example, my anti-Caro prep is currently a somewhat solid gambit, but I know the forced mate lines, the winning endgame lines, and all of the dozen-odd declined/semi-accepted/fully-accepted refutation lines. Even though I’m “worse” on move 4, I know how to play my -0.5 positions really well. If I didn’t, I wouldn’t play the line, because I would simply lose constantly.
Like the Krejcik against Alekhine defence or the classical KDG?