Titweed is also just used as a simple insult hurled in polite convosation.
"dude check out the titweed on that!",
"duuudde! thats so fuked up!"
"mega weed of the tit there my friend!"
Casual insulting of a "Tit" who is "weedy".
"fuk me Adam, ur such a fuking little weedy titweed"