* A misspelling of "inter-trip": This could refer to the period between trips, the time spent in between journeys.
* A specific industry term: It could be a term used in a particular field, such as travel, logistics, or transportation.
* A phrase in another language: It could be a translation of a phrase in another language.
To help me understand what you mean by "inter trip," please provide more context:
* What is the situation where you heard this term?
* What is the general topic you are discussing?
With more information, I can better understand what "inter trip" refers to.