Green’s Dictionary of Slang

batter n.1

[SE batter, a form of paste]

1. flattery.

[UK]T. Rhone Old Story Time I i: Batter batter, she batter batter.

2. (US) money [pun on SE batter/dough n. (1)].

[US]C.L. Cullen Tales of the Ex-Tanks 351: This is too much of the batter for you to have on you all at one and the same time, Tommy.

3. (also baby batter) semen.

[SA]K. Cage Gayle 55/2: baby batter n. semen (You ever had baby batter in your eye?).

In phrases

splatter one’s batter (v.)

to ejaculate.

L. Vassey Advice for Maniacs [Internet] Whaddya want me to do, phone up your goddamn boyfriend on your behalf and tell him to stop squirting his man-muck all over your ugly mush? Maybe he keeps getting your face mixed up with your shitty asshole, they will obviously look alike, maybe that’s where he really wants to splatter his batter.