Weenfart is a normal bodily function in which a burst of air is secreted or farted out from the hole of the penis; much like the queef is to the vagina.
in laymens terms it means a fart out of the penis.
A weebtard is a weeaboo (White personobsessed with japanese culture and anime) who is also retarded. One may argue that all weeaboos are retarded; suggesting all weeaboos are then weebtards. That would be correct.
Person 1: Would you like to have Weentercourse?
Person 2: ...um, what's that?
Person 1: It's where I stick my Weenis into your Weegina...
Person 2: Oh, that sounds kinky.