hold out on 隠し事をする

hold out on は出し惜しむ、隠し事をする、事情を伏せておくです。3:59 all pretty cool, but I feel like you're hold out on me. 凄くよかった、でも、まだ何か出し惜しんでいない？

Exploding soda cans with electromagnets in SLOW MOTION ft Joe Hanson
https://www.youtube.com/watch?v=xtiY7_OuEd0  21:20 is there someone else you're interested in? Dude, do not hold out on me. 誰か他に好きな女性がいるのかい？隠し事はなしだぜ。
Elevator Girl 2010 TVRip Arthur Yunzal Arthur Yunzal

練習問題解答
b-2856 holding something out on me