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OT

Meaning Off topic
Type Acronym
Popularity ★ ★ ★ ★ ★  Popular
Usage Online Only (chat, messaging, e-mail)
Comments

For example, "OT: (some unrelated statement)." Often used in online discussion boards when posting a message that does not relate specifically to the current thread.

Example "This is a little OT, but has anyone noticed more bugs in the latest release of the program?"
Updated October 5, 2016
Meaning Other topic
Type Acronym
Popularity ★ ★ ★ ☆ ☆  Average
Usage Online Only (chat, messaging, e-mail)
Comments

Refers to another subject. Not as common of a meaning as "Off topic."

Example "I think I liked the OT better than this one."
Updated May 2, 2022
Meaning Overtime
Type Abbreviation
Popularity ★ ★ ★ ☆ ☆  Average
Usage General (not just online)
Comments

An abbreviation commonly used in sports to refer to extended play if the score is still tied at the end of regulation time.

Example "He scored this winning goal in OT to give them the win."
Updated September 13, 2022
Information from PC.net
https://pc.net/slang/meaning/ot
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