Damn is used in future seasons. (later seasons?)
Kieron shouts at Caleb, "Why don't you take a damn dip in your own damn swimming pool?"
Bloody is used frequently in later seasons.
A few "shut up" by Annie.
A few uses of sh*ts in "The Jay-Athon", but they were beeped out and they got put in timeout.
There is one use of 'Good there isn't any more darn damage in this living room', said by Mandy (Leslie Comes Back)
2 uses of P*ss. (Unexoected Surprise and Broken Plant)
A few "darns".
The word "Crap" is used often throughout the show.
Name-calling, such as "Idiot" and "Stupid" is used most throughout the show.
The Mighty Six makes up an insult which is "Lazy Boy/Girl".
In the show, Jay calls Old Man L. a poor t*t.
There is one use of f*ck in Season 3.
Arse is used from Series 3 onwards.