From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
boff /bˈɒf/ <v>
jdn. ficken, vögeln, bumsen, poppen, pimpern, rammeln, pudern <v, trans> [Ös.] [vulg.]
Note: Mann
Synonyms: fuck, bang, hump, screw, poke, mash, tumble, shaft, knob, shag, roger, bonk, boink, bone, shtup, schtup, root sb.
see: fucking, banging, humping, screwing, poking, mashing, tumbling, boffing, shafting, knobing, shaging, rogering, bonking, boinking, boning, shtuping, schtuping, rooting, fucked, banged, humped, screwed, poked, mashed, tumbled, boffed, shafted, knobbed, shagged, rogered, bonked, boinked, boned, shtupped, schtupped, rooted