schnackseln
Translation
to have sex, to screw, to get it on
Examples
Sie haben gestern Nacht geschnackselt.
They had sex last night.
Grammar Patterns
((with sb.)) to have sex with sb. She had sex with him.
Similar Words
vögeln, bumsen, Sex haben (all colloquial/vulgar for 'to have sex')
Etymology
The origin is uncertain, possibly onomatopoeic. It's a regional (Bavarian/Austrian) slang term.
Memory Tips
A very informal, slang word. Imagine it sounds a bit like 'snack' and 'axel'. Use only in very casual, private conversations.