"Unsteady gait" refers to a person's walking being unstable or shaky. It means that they have difficulty maintaining a steady and balanced movement while walking. Full definition
His over-eagerness combined with the lurching, unsteady gait of a -LSB-...] (bestoftwins.com)
The scientists infected 1 - day - old C57BL / 6 mice with Zika virus and found that they develop symptoms of neurological disease, such as unsteady gait and seizures that gradually fade over two weeks. (sciencedaily.com)
Some dogs that do not have the mutant MDR1 gene still experience side effects such as listlessness, skin rash, tremors and unsteady gait while on this medication at the high dose levels needed to kill the mites. (2ndchance.info)