From Wiktionary, the free dictionary
call it (third-person singular simple present calls it, present participle calling it, simple past and past participle called it)
- (idiomatic) To call it a day
2004 March 15, Ian Chode, Urban Dictionary[1]:Right, I'm going to call it, that's enough for me.
2024 October 24, 🗽𝕻𝖆𝖙𝖗𝖎𝖈𝖐 𝕯𝖚𝖑𝖐𝖆🗽, Twitter[2]:I'm going to call it. See you all tomorrow ✌🏻💙👋🏻
2024 October 24, DameAflame 🤟🏽, Twitter[3]:Yeah I think I’m gunna call it, see you guys on Friday
- (idiomatic) To predict
2024 April 16, Reddit[4]:I'm going to call it now. If DMB
2024 May 25, AnythingWorkz, Reddit[5]:Gonna call it now. Tyler is gonna be singing in the next album.
2024 November 9, Shaenyra, Reddit[6]:I call it now - I think Joel would be a great father