Learner's definition of GUILT TRIP
a feeling of guilt that you get when someone suggests that you have done something wrong or that you are not doing something that you should
“I guess you're just too busy to call.” “I don't need the guilt trip, Mom. If you want me to call more often, just say so.”
The speaker laid/put a (big) guilt trip on us [=tried to make us feel bad or sorry] by describing in detail how much waste the average American generates.