Why do I get jealous over a girl even though I don't want to be with her at all?

 The informal but commonly used synonym of "hooligans" is thugs.

Thugs are typically described as violent or aggressive people who are involved in criminal activity. They are often associated with gangs and street crime.

Here are some other informal synonyms for "hooligans":

troublemakers

delinquents

ruffians

louts

yobs

scumbags

hoodlums

hooligans

It is important to note that these words are all informal and can be considered offensive by some people. It is important to use them with caution and to be aware of the context in which you are using them.

Here is an example of how to use the word "thugs" in a sentence:

The police are trying to crack down on the gangs of thugs who are terrorizing the neighborhood.

I hope this helps!