A phrase describing the temperature. In reference to a woman's breast (tit) which are "hot" to males. To be "hot as a tit" is for something to be extremely hot.
"You should've rolled down your carwindows, it's hot as a tit in here now."
The preparation is to rub copious amounts of soap over your womans breasts. This can be done with hands or dick, then push the breasts together and hump until orgasm.
"Get anywhere Friday night?"
"Yeah, got a soapytit wank off the barmaid"
"You lucky shite!"
The excess of abdomen that overflows due to someone insisting on wearing pants that are several sizes too small to prevent having to come to terms with the fact that they are no longer small enough to wear the majority of their wardrobe.
"Poor girl, she has no mirror or friends that are good enough to tell her she has a tummy tit."