What does it mean:" to put a foot into it"?

What means 'slimball'?

Do people in the UK use often words like:
foul up
pig out
harcormorner
disgruntled
faffing
dawdle
What are more common words which means the same what above words?

Do people in the UK use the expression:" Never slap a man who's chewing tobacco"?

What does it mean:" I'll own him".

What does mean " I've made a bloomer". Is it a common expression?

What does it mean:" I don't want to lead him on".