The ornamental design for a teethirrigator, as shown and described.
FIG. 1 is a perspective view of a teeth irrigator showing my new design;
FIG. 2 is another perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof; and,
FIG. 9 is a perspective view of the teeth irrigator where the teeth irrigator is in a configuration of use.
The broken lines in FIG. 9 showing a teeth irrigator depict environment and form no part of the claimed design. The other broken lines in the drawings depict portions of teeth irrigator and form no part of the claimed design.