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The four-letter word that built billion-dollar empires out of a thumbs-up.

means To find something agreeable or pleasant — or, as a particle, the all-purpose verbal filler and quotation marker that peppers casual speech ('I was, like, done').

from From Old English 'lician,' meaning to please or be pleasing, rooted in a Germanic family (cousin to Dutch 'lijken' and German 'gleichen,' to resemble). The 'similar to' sense comes from a related Old English word 'gelic,' meaning 'having the same form' — literally 'with-the-body,' from 'lic,' body, the same 'lic' hiding in 'corpse' words across Germanic tongues. So the verb you do with a thumb and the word you use to compare things were once near-siblings, both circling the idea of 'matching' or 'suiting.' The modern filler-and-quotation 'like' is a 20th-century colloquial blossoming of the comparison sense.

thumb origins
Facebook's button almost shipped as Awesome instead
verbal tic
Valley girls weaponized it into a sentence pause
old English
Once meant body, as in lich and corpse
dopamine engine
Notifications hijack the same reward circuit as slot machines
simile fuel
Powers nearly every poetic comparison ever written
for instance

like button — facebook feature introduced 2009, now primary engagement metric across social platforms

like mike — 1994 film starring bow wow about a kid who inherits michael jordan's magical sneakers

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