The story
From listen + up. First use appears c. 1933, although the exact date of its first use is uncertain. See cite below.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: To listen closely; to pay attention. Full definition →
From listen + up. First use appears c. 1933, although the exact date of its first use is uncertain. See cite below.
Etymology from Wiktionary, CC BY-SA 4.0.