gotta [got-uh] Pronunciation Spelling. got to; have got to. Liberaldictionary.com
Usage note See get. Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019 British Dictionary definitions for gotta gotta verb, contraction of slang got to Collins English Dictionary – Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Word Origin and History for gotta
attempt to represent the casual pronunciation of got to, attested from 1885.
Online Etymology Dictionary, © 2010 Douglas Harper