The phrase comes from Spanish, where me gusta means I like it, and online it became tied to the Me Gusta rage comic face that spread in the early 2010s. That grinning character was drawn to show gleeful, slightly unhinged pleasure, and short voice versions later circulated on soundboards and in edits. This oh me gusta clip condenses that same joke into under two seconds, so creators can drop in the reaction without showing the face itself, and it remains popular for ironic approval.