GBU is a common internet sign-off meaning "God Bless You" — a warm, friendly way to close a message or comment without getting too formal. You'll spot it in comments sections, Discord servers, and text threads, often tacked on at the end of a supportive or appreciative message. It carries genuine warmth without being heavy-handed about it. In military contexts, GBU also stands for Guided Bomb Unit, a precision munition designation — very different energy from the blessing version.
Thanks for all your help today, seriously, GBU!
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(military, US) Guided Bomb Unit.
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Viral internet speak — memes, ratios, main-character moments, and the algospeak of every platform from Twitter to Reddit to TikTok comment sections.
See all Internet & Memes slang on Slangora.