some one who wets the bed

The name applied to a poster on an internet forum who gets upset by other posters and throws their toys out their pram, asking for posters to apologise, be banned, sending personal messages and on the whole pissing their pants and bed.

someone who accidently pees their pants at night

A person who should wear a diaper before falling asleep.

softcocks

A liberal, or a socialist. In the US most likely a member of the Democrat Party.

Someone who leaves a party early; one who refuses to stay out past an arbitrarily defined "bed-time" when they have obligations in the morning.