Reduction (linguistics)

In spoken languages, reduction is a way to pronounce a certain word more quickly than usual. For example, in English language

• getcha (get you)
• betcha (bet you)
• don't cha (don't you)
• gotcha (got you)
• gotta (got to)
• hafta (have to)
• hasta (has to)
• wanna (want to)
• wannabe (want to be)
• gonna (going to)
• kinda (kind of)
• kindsa (kinds of)
• lot (lot of)
• lots (lots of)
• gimme (give me)
• lemme (let me)
• I dunno. (I don't know)
• sez (says)
• coulda (could have)
• shoulda (should have)
• woulda (would have)
• mighta (might have)
• musta (must have)

Reference

http://eleaston.com/pronunciation/reduction2.html