Green’s Dictionary of Slang

(US campus) see you later, goodbye.

1989		P. Munro Sl. U.
1996		Eble Sl. and Sociability 79: Three blendlike expressions retain Spanish elements: hasta la bye bye, hasta hasta pasta, and adios amoebas mean ‘good-bye’.
1997		K. Kainulainen ‘University Euphemisms in Calif. Today’ 🌐 I will consider expressions surrounding something bad or discreet as euphemism and other invented expressions as slang. Therefore [...] ‘Kodak moment’ for ‘appropriate time for taking pictures’ or ‘Hasta la pasta!’ meaning ‘See you later!’ would be slang.