ParametricPlot
[{$f_x$, $f_y$}, {u, $u_{min}$, $u_{max}$}]ParametricPlot
[{{$f_x$, $f_y$}, {$g_x$, $g_y$}, ...}, {u, $u_{min}$, $u_{max}$}]ParametricPlot
[{$f_x$, $f_y$}, {u, $u_{min}$, $u_{max}$}, {v, $v_{min}$, $v_{max}$}]ParametricPlot
[{{$f_x$, $f_y$}, {$g_x$, $g_y$}, ...}, {u, $u_{min}$, $u_{max}$}, {v, $v_{min}$, $v_{max}$}]ParametricPlot[{Sin[u], Cos[3 u]}, {u, 0, 2 Pi}]
ParametricPlot[{Cos[u] / u, Sin[u] / u}, {u, 0, 50}, PlotRange->0.5]
ParametricPlot[{{Sin[u], Cos[u]},{0.6 Sin[u], 0.6 Cos[u]}, {0.2 Sin[u], 0.2 Cos[u]}}, {u, 0, 2 Pi}, PlotRange->1, AspectRatio->1]