A 1-5 is a code name for a male that's affiliated with the street gang, the "15 Block Gangsters". A 4-5 is a code name for a female that's affiliated with the "15 Block Gangsters". The 4-5 comes from their call to greet each other saying, "1-5 1-5, 4-5 4-5".
1-5/4-5:
Yeah that's my lil 1-5
That swaty over there, she my 4-5
by Skreetz December 20, 2018
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Synonym for FUCK!!! Can be used as noun, verb, adjective or adverb!
4-5-10, this situation I am in sucks!

It is soooo 4-5-10 annoying!
by ABSTAR2010 September 20, 2019
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How big your heart is when you love. Loving with more than your whole heart or with an enlarged heart.
by Banjo20 November 14, 2020
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Drinking: When you're in 5th gear cruisin, hit 3rd red-lined, then take forth and send it - usually applied during day drinking
In a sentence/conversation: Q-What should we do tonight.
A-Fuck it- let's 5-3-4

Synonyms: Second Wind, Throttle Up and, and Send it

Antonyms: Go to bed>, pump the breaks>, and >you little bitch
by BillCharles December 19, 2020
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