The phrase "get on technicality" is often used to describe a situation where someone has found a loophole in the rules or laws. However, there are various synonyms that can be used in place of this phrase to express the same idea. One alternative could be "exploit a loophole," which means to take advantage of a gap or oversight in a system. Another could be "manipulate the system," which implies that someone has used their knowledge of how a system works to their advantage. Overall, these synonyms convey the idea that someone has found a way to achieve their desired outcome by using the rules or laws to their advantage.