The phrase "zoo trip" refers to a visit or outing to a place where animals are kept for public display and education purposes called a zoo. Full definition
Case in point, this recent zoo trip we went on this past weekend.... (sandyalamode.com)
In their time away from Turner Animal Hospital Dr. McConkey and Tara enjoy going on zoo trips with their 6 year old son, Tristan. (turneranimalhospital.com)
She is being allowed to attend her school zoo trip tomorrow on the bus, but she is 6 1/2 and I am comfortable with the chaperones that are going and I've known her teacher for many years, so I feel she is safe. (crunchydomesticgoddess.com)