let it sit: You’ll eat half of it? OK, let it go at that (1898+)
[li-tish-uh, -tee-shuh] /lɪˈtɪʃ ə, -ˈti ʃə/ noun 1. a female given name: from a Latin word meaning “gladness.”. fem. proper name, literally “gladness,” from Latin laetitia, from laetus “glad,” of unknown origin.
- Let it lay
Also, leave her lay. Allow it to rest; leave it alone. For example, Don’t discuss their gift anymore; let it lay. The use of her in the variant is a slangy version of “it.” [ ; first half of 1900s ]
- Let it rip
Also, let her rip. Go ahead, proceed unchecked. For example, Once you get the tractor started, let it rip. The use of her in the variant comes from a tradition of referring to vehicles as feminine. [ Mid-1800s ]
- Let it sit
verb phrase To decline to object or interfere; acquiesce: ”He wasn’t perfect, but he tried.” I let that one sit there, unwilling to challenge her version of events/ ”Let it sit, then,” he said with the slightest of shrugs (1990s+)