A 'swall rat' is someone who constantly is drinking alcohol, their 'swall.' A Northern Ireland slang word, used amongst younger people. When people call others a 'swall rat' it is usually taking the piss but can be used seriously. Also see 'swall demon.'
1. Oh my word, you had one beer? You swall rat!

2. She's a complete swall rat, she was just swallin' on her swall all night long.
by xhjx July 26, 2010

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×