US standard spelling of 5000 metres.

An Internet connection nominally capable of download speeds up to 56 kbit/s (56,000 bits per second).

(Internet slang, humorous) Alternative form of fivever

plural of A-5

plural of 50-50

plural of 5GL

Alternative form of 50s

Alternative spelling of 50s

simple past tense and past participle of 5150

(humorous, Canada, US) This is my guess.