it is when you have anal sex with someone, then pulling out your penis which is covered in their shit and then getting your shit covered penis sucked, blowjob.
After having anal sex
Matilda: wow that was great
Nathaneal: ready for desert?
Matilda: mmm... is it your choc top?
When having anal sex with a homosexual partner,
having shit on the knob of you penis after withdrawing.
Man, you just gave me a choc top
A homosexual after having sex with his partner.
Partner1 - WOW! I got a choc top!
Partner2 - I feel so Fudged right now.
The poo on the end of a gays dick from to much intercourse of the anal kind
Josh you suck on kanes choctop
1. Somebody attuned to doing someone up the anus for sexual purposes
that guy's such a choctop cos he knocked that girl up the batty