a stupid person tht is just a plain
fuck up and has no life what so ever. most dumbfucks are reading this now because someone called them this and they dont know what the
hell it means. well now u know dumbfuck.
another meaning is to not know who to
fuck or have intercourse because of that one day you skipped sex ed class because you were grossed out so now your holding ur penis in your hand wondering where.to put it in the women. since your a dumbfuck you go for the armpit.
1- that
guy over there is just a plain dumbfuck.
2- girl 1: how was u and your date last night wink
winkgirl2: terrible afterwarda we went to have
sex.and he stuck his penis in my armpit trying to dumbfuck.
girl 1: what a dumbfuck